An unexplained plague has decimated the world's population and yet, the dead aren't dying. They've become zombies, stalking endlessly in a constant quest to feed on the flesh and blood of the few remaining living.

A ragtag group of desperate survivors in a Wisconsin town seek refuge in a large indoor mall, where they must learn not only to protect themselves from the ever-increasing zombie horde, but also to co-exist with each other as a last bastion of humanity. Sealed off from the rest of what used to be the world, the group uses every available resource (both within and without) in their against-all-odds fight to remain alive and human.